In Chapter 7, we introduced texture mapping, which enabled us to map fine details from an image onto our triangles. However, our normal vectors are still defined at the coarser vertex level and interpolated over the triangle. In this chapter, we study a popular method for specifying surface normals at a higher resolution.
The Normal Map demo for this chapter is available in the download files.
To understand why we need normal mapping.
To discover how normal maps are stored.
To learn how normal maps ...